Initial class construction
This commit is contained in:
João Narciso
194
Git/mingw64/share/git-gui/lib/class.tcl
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194
Git/mingw64/share/git-gui/lib/class.tcl
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# git-gui simple class/object fake-alike
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# Copyright (C) 2007 Shawn Pearce
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proc class {class body} {
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if {[namespace exists $class]} {
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error "class $class already declared"
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}
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namespace eval $class "
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variable __nextid 0
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variable __sealed 0
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variable __field_list {}
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variable __field_array
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proc cb {name args} {
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upvar this this
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concat \[list ${class}::\$name \$this\] \$args
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}
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"
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namespace eval $class $body
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}
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proc field {name args} {
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set class [uplevel {namespace current}]
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variable ${class}::__sealed
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variable ${class}::__field_array
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switch [llength $args] {
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0 { set new [list $name] }
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1 { set new [list $name [lindex $args 0]] }
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default { error "wrong # args: field name value?" }
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}
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if {$__sealed} {
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error "class $class is sealed (cannot add new fields)"
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}
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if {[catch {set old $__field_array($name)}]} {
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variable ${class}::__field_list
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lappend __field_list $new
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set __field_array($name) 1
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} else {
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error "field $name already declared"
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}
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}
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proc constructor {name params body} {
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set class [uplevel {namespace current}]
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set ${class}::__sealed 1
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variable ${class}::__field_list
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set mbodyc {}
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append mbodyc {set this } $class
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append mbodyc {::__o[incr } $class {::__nextid]::__d} \;
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append mbodyc {create_this } $class \;
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append mbodyc {set __this [namespace qualifiers $this]} \;
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if {$__field_list ne {}} {
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append mbodyc {upvar #0}
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foreach n $__field_list {
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set n [lindex $n 0]
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append mbodyc { ${__this}::} $n { } $n
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regsub -all @$n\\M $body "\${__this}::$n" body
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}
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append mbodyc \;
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foreach n $__field_list {
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if {[llength $n] == 2} {
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append mbodyc \
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{set } [lindex $n 0] { } [list [lindex $n 1]] \;
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}
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}
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}
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append mbodyc $body
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namespace eval $class [list proc $name $params $mbodyc]
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}
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proc method {name params body {deleted {}} {del_body {}}} {
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set class [uplevel {namespace current}]
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set ${class}::__sealed 1
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variable ${class}::__field_list
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set params [linsert $params 0 this]
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set mbodyc {}
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append mbodyc {set __this [namespace qualifiers $this]} \;
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switch $deleted {
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{} {}
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ifdeleted {
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append mbodyc {if {![namespace exists $__this]} }
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append mbodyc \{ $del_body \; return \} \;
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}
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default {
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error "wrong # args: method name args body (ifdeleted body)?"
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}
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}
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set decl {}
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foreach n $__field_list {
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set n [lindex $n 0]
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if {[regexp -- $n\\M $body]} {
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if { [regexp -all -- $n\\M $body] == 1
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&& [regexp -all -- \\\$$n\\M $body] == 1
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&& [regexp -all -- \\\$$n\\( $body] == 0} {
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regsub -all \
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\\\$$n\\M $body \
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"\[set \${__this}::$n\]" body
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} else {
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append decl { ${__this}::} $n { } $n
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regsub -all @$n\\M $body "\${__this}::$n" body
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}
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}
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}
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if {$decl ne {}} {
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append mbodyc {upvar #0} $decl \;
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}
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append mbodyc $body
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namespace eval $class [list proc $name $params $mbodyc]
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}
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proc create_this {class} {
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upvar this this
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namespace eval [namespace qualifiers $this] [list proc \
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[namespace tail $this] \
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[list name args] \
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"eval \[list ${class}::\$name $this\] \$args" \
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]
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}
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proc delete_this {{t {}}} {
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if {$t eq {}} {
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upvar this this
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set t $this
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}
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set t [namespace qualifiers $t]
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if {[namespace exists $t]} {namespace delete $t}
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}
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proc make_dialog {t w args} {
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upvar $t top $w pfx this this
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global use_ttk
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uplevel [linsert $args 0 make_toplevel $t $w]
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catch {wm attributes $top -type dialog}
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pave_toplevel $pfx
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}
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proc make_toplevel {t w args} {
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upvar $t top $w pfx this this
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if {[llength $args] % 2} {
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error "make_toplevel topvar winvar {options}"
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}
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set autodelete 1
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foreach {name value} $args {
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switch -exact -- $name {
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-autodelete {set autodelete $value}
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default {error "unsupported option $name"}
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}
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}
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if {$::root_exists || [winfo ismapped .]} {
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regsub -all {::} $this {__} w
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set top .$w
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set pfx $top
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toplevel $top
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set ::root_exists 1
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} else {
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set top .
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set pfx {}
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}
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if {$autodelete} {
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wm protocol $top WM_DELETE_WINDOW "
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[list delete_this $this]
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[list destroy $top]
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"
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}
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}
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## auto_mkindex support for class/constructor/method
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##
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auto_mkindex_parser::command class {name body} {
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variable parser
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variable contextStack
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set contextStack [linsert $contextStack 0 $name]
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$parser eval [list _%@namespace eval $name] $body
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set contextStack [lrange $contextStack 1 end]
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}
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auto_mkindex_parser::command constructor {name args} {
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variable index
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variable scriptFile
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append index [list set auto_index([fullname $name])] \
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[format { [list source [file join $dir %s]]} \
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[file split $scriptFile]] "\n"
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}
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